CI: use free runners for 4 fast windows jobs

Author: marcoieni

src/ci/github-actions/jobs.yml

@@ -475,7 +475,7 @@ auto:
         --enable-profiler
       SCRIPT: python x.py dist bootstrap --include-default-paths
       DIST_REQUIRE_ALL_TOOLS: 1
-    <<: *job-windows-8c
+    <<: *job-windows
 
   - image: dist-i686-mingw
     env:
@@ -488,7 +488,7 @@ auto:
       SCRIPT: python x.py dist bootstrap --include-default-paths
       DIST_REQUIRE_ALL_TOOLS: 1
       CODEGEN_BACKENDS: llvm,cranelift
-    <<: *job-windows-8c
+    <<: *job-windows
 
   - image: dist-x86_64-mingw
     env:
@@ -501,10 +501,10 @@ auto:
       NO_DOWNLOAD_CI_LLVM: 1
       DIST_REQUIRE_ALL_TOOLS: 1
       CODEGEN_BACKENDS: llvm,cranelift
-    <<: *job-windows-8c
+    <<: *job-windows
 
   - image: dist-x86_64-msvc-alt
     env:
       RUST_CONFIGURE_ARGS: --build=x86_64-pc-windows-msvc --enable-extended --enable-profiler
       SCRIPT: python x.py dist bootstrap --include-default-paths
-    <<: *job-windows-8c
+    <<: *job-windows